Linux中查看和设置DNS服务器

查看dns服务器

方法一：cat /etc/resolv.conf

[root@6000m ~]# cat /etc/resolv.conf
# Generated by NetworkManager
search localdomain
nameserver 172.16.1.1
nameserver 192.168.171.2

方法二：nslookup命令

[root@6000m ~]# nslookup www.baidu.com
Server:         172.16.1.1         //dns服务器IP地址
Address:        172.16.1.1#53      //dns服务器IP地址

Non-authoritative answer:
www.baidu.com   canonical name = www.a.shifen.com.
Name:   www.a.shifen.com
Address: 61.135.169.121           //百度服务器IP
Name:   www.a.shifen.com
Address: 61.135.169.125          //百度服务器IP

方法三：dig命令

[root@6000m ~]# dig | grep SERVER
;; SERVER: 172.16.1.1#53(172.16.1.1)

修改DNS服务器

修改配置文件/etc/resolv.conf，修改完以后可以直接生效

[root@6000m ~]# vim /etc/resolv.conf
# Generated by NetworkManager
search localdomain
nameserver 8.8.8.8
nameserver 114.114.114.114

通过nslookup查看

[root@6000m ~]# nslookup www.baidu.com
Server:         8.8.8.8
Address:        8.8.8.8#53

Non-authoritative answer:
www.baidu.com   canonical name = www.a.shifen.com.
www.a.shifen.com        canonical name = www.wshifen.com.
Name:   www.wshifen.com
Address: 103.235.46.39